Flowers have four parts: sepals,
petals, stamens and pistils.
The stamens and pistils are most prominent here in this dissected tulip
flower. The black anthers and cream-colored filaments
make up the stamen. The pistil is white, columnar, and has a
three-lobed stigma.

In this view, you can see the position
of the sexual parts (stamens, pistils) to the non-sexual parts (sepals,
petals. The collective term for the stamens is androecium;
while the collective term for the pistils is gynoecium.

Here, the sepals, petals and stamens
were stripped away to show the pistil, which shoes five individual
stigma-styles attached to an ovary.

Here are the six stamens of the daylily,
Hemerocallis fulva. The anthers and the filaments that
support them are obvious here.

In this close-up of the flower of Hepatica
americana, you see the colored petals and a hint of the green sepals
under the petals.

In this view of Trillium undulatum,
the three sepals are outside and between the three petals. The
collective term for sepals is calyx, and the collective term for petals
is corolla.